Bitcoin's Vulnerability to Quantum Technology: 34.6% of Supply at Risk

NotFinancialAdviser · 2026-03-23T18:14:13+00:00

The latest report by Ark Invest and Unchained highlights a significant security vulnerability in the Bitcoin ecosystem due to the threat of quantum computing. Approximately one-third of the total Bitcoin supply could be at risk if advanced quantum computers become capable of breaking elliptic curve cryptography. Although this technology is not an immediate threat, the Bitcoin community should take it seriously. Various categories of Bitcoin addresses face differing risk levels. Ark Invest views this as a long-term risk, suggesting that there remains time to develop quantum-resistant encryption protocols.

NotFinancialAdviser

2026-03-23 18:14:13

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The latest research report prepared by Ark Invest and Unchained reveals that the Bitcoin ecosystem faces a serious security vulnerability regarding the threat of quantum computing. According to the report, approximately one-third of the total Bitcoin supply could be at potential risk of theft if advanced quantum computers are developed.

What Is the Quantum Computing Threat and How Could It Affect Bitcoin?

If quantum computers become capable of solving elliptic curve cryptography (ECC) algorithms, which form the foundation of the Bitcoin network, the security of millions of BTC could be compromised. However, this technological advancement is expected to take years to materialize. A report by Odaily Star Daily emphasizes that, as of now, quantum technology does not pose an immediate threat, but the Bitcoin community should take this risk seriously.

Detailed Analysis of Bitcoin Amounts at Risk by Address Type

Assets under quantum threat are categorized into different groups. First, approximately 5 million BTC (25% of the total supply) are vulnerable due to address reuse, making them portable. The second category includes about 1.7 million BTC (8.6%) stored in early P2PK (Pay-to-Public-Key) addresses. The third, smaller group consists of around 200,000 BTC (1%) held in P2TR address types, which are affected by the Taproot architecture. These different address categories carry varying levels of risk in the event of a quantum computer attack.

Ark Invest Believes the Protection Window Is Still Open

Ark Invest considers this situation a “long-term risk” and emphasizes that the Bitcoin community still has enough time to develop and implement quantum-resistant cryptographic protocols. Recognizing that the threat is not yet urgent but cannot be ignored, this period should be viewed as a valuable opportunity to proactively prepare protective measures. The ability of the Bitcoin network to adapt to such developments remains key to its long-term security.

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